A program that is identified by a detection using the format 'Dropped:[variant]' indicates that the program was identified by a Heuristic Detection of a file or program that appears to be designed to 'drop' or install a second file; the dropped file would have triggered a detection already available in our detection databases.
The detection name may also include information about the type of program being dropped, such as:
About Heuristic Detections
Heuristic Analysis (also known as behavioral analysis) is an advanced type of antivirus technology that evaluates any potential threats by examining a suspected program's intended actions and effects on a computer system.
To examine a program's potential behavior, the antivirus program executes it in a self-contained, "virtual system" environment. This allows the antivirus program to evaluate how the program's behavior affects the virtual system, without compromising or endangering the user's actual system.
A program that appears to perform suspicious or potentially malicious actions will trigger a Heuristic Detection, such as the one above.